Page 1 of 3 123 LastLast
Results 1 to 20 of 56

Thread: Macro

  1. #1
    Member
    Join Date
    Jan 2006
    Location
    Bukit Timah
    Posts
    267

    Default Macro

    Hi guys,

    Actually, i don't really understand what does macro lens does ? it makes the subject big ? If it makes the subject big, is it the same as getting a 600mm to fill the frame with the subject ? can someone explain this to me ? thank you guys.

    regards,
    mark

  2. #2
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Quote Originally Posted by marklim
    Hi guys,

    Actually, i don't really understand what does macro lens does ? it makes the subject big ? If it makes the subject big, is it the same as getting a 600mm to fill the frame with the subject ? can someone explain this to me ? thank you guys.

    regards,
    mark
    Macro is a specialised lens to take close ups of various objects. For example, take a small spider's eyes. Under the human eye we can't really see the spider's eyes unless we go very very close to it, same for the macro lens. It's able to zoom in on the spider and magnify it to make it larger, so the outcome is an enlarged close up view of the spider with its eyes prominently seen.

    A regulars lens is TOTALLY different and cannot be compared to macro as macro enlarges the tiny details. Don't say a 600mm lens, even a 1200mm cannot do the job that macro lens can. These regular super telephoto lens only bring your subject much closer as it does for typical zoom lens.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  3. #3
    Member
    Join Date
    Jan 2006
    Location
    Bukit Timah
    Posts
    267

    Default Re: Macro

    Quote Originally Posted by Snoweagle
    Macro is a specialised lens to take close ups of various objects. For example, take a small spider's eyes. Under the human eye we can't really see the spider's eyes unless we go very very close to it, same for the macro lens. It's able to zoom in on the spider and magnify it to make it larger, so the outcome is an enlarged close up view of the spider with its eyes prominently seen.

    A regulars lens is TOTALLY different and cannot be compared to macro as macro enlarges the tiny details. Don't say a 600mm lens, even a 1200mm cannot do the job that macro lens can. These regular super telephoto lens only bring your subject much closer as it does for typical zoom lens.
    Hmm, pardon my ignorance. But if i use a macro lens to enlarge the spider's eyes, isn't it the same as using a 600mm to zoom all the way to the eye ?

  4. #4
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Quote Originally Posted by marklim
    Hmm, pardon my ignorance. But if i use a macro lens to enlarge the spider's eyes, isn't it the same as using a 600mm to zoom all the way to the eye ?
    No, only macro lens have to ability to focus at extreme closeness, as close as only a few cm away. A regular lens cannot do that as once u get a bit closer to the subject, it cannot focus anymore.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  5. #5
    Member
    Join Date
    Jan 2006
    Location
    Bukit Timah
    Posts
    267

    Default Re: Macro

    ok. assuming i stand 2feet away from a spider using a 200mm and i stand 1 feet away using a 100mm macro. what would be the difference ?

  6. #6
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Quote Originally Posted by marklim
    ok. assuming i stand 2feet away from a spider using a 200mm and i stand 1 feet away using a 100mm macro. what would be the difference ?
    Depending on the minimum focusing distance of the 200mm lens. I dun think the 200mm lens can focus at 2 feet away, you still cannot get the closeness of a 100mm macro. I've used the 100mm macro before and results are stunning!
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  7. #7
    Member
    Join Date
    Nov 2004
    Location
    Singapore
    Posts
    1,502

    Default Re: Macro

    Go borrow or buy a macro lens to try out. It will solve all your mystery...
    TO SEE, TO FEEL, TO PHOTOGRAPH.

  8. #8
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Yes...practical work is always better.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  9. #9
    Member
    Join Date
    Jan 2006
    Location
    Bukit Timah
    Posts
    267

    Default Re: Macro

    haha.. okie. thanks guys !

  10. #10
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Enjoy macro pal!
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  11. #11
    Moderator ortega's Avatar
    Join Date
    Nov 2004
    Location
    Singapore, Singapore, Singapor
    Posts
    23,686
    Blog Entries
    7

    Default Re: Macro

    the difference is the minimum focusing distance.
    and thus magnification

  12. #12
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Quote Originally Posted by ortega
    the difference is the minimum focusing distance.
    and thus magnification
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  13. #13
    Member
    Join Date
    Nov 2004
    Location
    Singapore
    Posts
    1,502

    Default Re: Macro

    Macro photography is really fun. Hop you like it too...
    TO SEE, TO FEEL, TO PHOTOGRAPH.

  14. #14
    Member
    Join Date
    Jul 2005
    Location
    Bt Batok
    Posts
    768

    Default Re: Macro

    the problem with ur [600mm fill frame] idea is tt the 600mm cant focus close enough to fill the frame with the subject, meaning the subject has to be at least X meters away for the lens to focus but at tt distance the frame wont be filled. think of it this way, if wat u said is true, wont i be able to point a ef1200mm at drop of blood 5cm away and take a photo of the red blood cells? obviously not

    a marco lens is able to focus close enough for its particular focal length to produce the [frame filling] img. so a 60mm marco will focus closer thn a 100mm marco but both will produce the same sized img only tt with the 100mm ur standing further away.

    1:1 simply means tt the focused img produced by the lens is the same size as the real life img. example: a 5cm long spider will be 5cm long on the film.

  15. #15

    Default Re: Macro

    Hi prata (kosong or with egg?) LOL

    Joke aside. Just to check with you, you mention that in 1:1 lens, a 5cm long subject will be 5cm long on the film. Is is the same as a 5cm long subject will be 5cm long in my viewfinder? Or whats the definition of "a 5cm long spider will be 5cm long on the film" in the digital world say a 1:1 macro lens on a full frame 5D dSLR. I mean at which rate I am viewing it on my monitor?

    I am quite puzzled with this, anyone can help me? Sorry for the stupid question.

  16. #16
    Member
    Join Date
    Jul 2005
    Location
    Bt Batok
    Posts
    768

    Default Re: Macro

    from secondary sch physics: at 2F, object size = img size. the img projected by the lens onto the sensor/film(full frame) will be the same size as the subject.

    in conventional lenses, the img is smaller thn the object. like if u use a wide angle lens and take a pic of a room, the img of the room formed on the sensor is much much smaller thn the actual room.

  17. #17
    Senior Member
    Join Date
    Dec 2005
    Location
    Clementi, Singapore
    Posts
    2,836

    Default Re: Macro

    ok, i have a question as well, how come on specs for some macro lenses the minimum focusing distance is still like 30cm? according to the above i should be able to get centimeters away?

    e.g.

    AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED

    Closest Marked Focus Dist [Macro Setting] : 0.31m/1.0ft
    Last edited by wildstallion; 23rd February 2006 at 06:51 PM.

  18. #18
    Senior Member
    Join Date
    Sep 2004
    Location
    Cons digger.
    Posts
    3,924

    Default Re: Macro

    Quote Originally Posted by Snoweagle
    No, only macro lens have to ability to focus at extreme closeness, as close as only a few cm away. A regular lens cannot do that as once u get a bit closer to the subject, it cannot focus anymore.
    my macro lens provides 1:2 reproduction but it's minimum focussing distance is ~1m.
    “How fortunate for leaders that men do not think.” - Adolf Hitler

  19. #19
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: Macro

    Quote Originally Posted by yanyewkay
    my macro lens provides 1:2 reproduction but it's minimum focussing distance is ~1m.
    Mine's 1:2.9 which estimates to around 1:3 and minimum focusing distance is 0.49m. Perhaps mine's magnification is smaller so need a closer focusing distance?
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  20. #20

    Default Re: Macro

    Quote Originally Posted by wildstallion
    ok, i have a question as well, how come on specs for some macro lenses the minimum focusing distance is still like 30cm? according to the above i should be able to get centimeters away?

    e.g.

    AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED

    Closest Marked Focus Dist [Macro Setting] : 0.31m/1.0ft
    I don't know why are you complaining about this, to me you should be happy for it instead. I believe a 180mm lens' minimum focusing distant is around 30cm too. Thats the main reason you gotta pay more for a 105mm lens than a 65mm lens because you are paying for the working distant!

    Since you can get 1:1 at 31cm, why must you go beyond that (eg 3cm ) unless you lens is not a 1:1 lens but a >1:1. The, yes, there is reason for you to go closer. The Canon MP-E65mm lens. You get 5x or so but the working distant is terrible.

    For butterflies shooters, why do they prefer a 180mm lens than a 90/100/105mm lenses since all these lenses give us 1:1 but the prince of a 180mm lens is double or the 90mm lens? Because of the working distant again .

Page 1 of 3 123 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •